package chapter04.Example15_17;

public class Example17 {
    public static void main(String[]args){
        Animal a1 = new Dog();
        System.out.println("动物类 a1= new Dog():"+(a1 instanceof Animal));
        System.out.println("动物类 a1= new Dog():"+(a1 instanceof Dog));
        Animal a2 =new Animal();
        System.out.println("动物类 a2= new Dog():"+(a2 instanceof Animal));
        System.out.println("动物类 a2= new Dog():"+(a2 instanceof Dog));
    }
}
